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A122900
as a simple table
n
a(n)
1
5
2
13
3
337
4
41
5
61
6
3697
7
113
8
10657
9
181
10
2211377674535255285545615254209921
[5,13,337,41,61,3697,113,10657,181, 2211377674535255285545615254209921]